Calculation method of pavement overlay function layer engineering quantity considering construction depth

Abstract

The application discloses a kind of calculation methods of pavement overlay function layer engineering quantity considering construction depth.It includes the following steps: each lane corresponding each section is as a unit for calculating overlay function layer engineering quantity;Determination and field marking of detection point are carried out on each unit pavement respectively;The construction depth of each detection point marked is measured, and the average construction depth of each unit is calculated;The material type, required thickness of each unit pavement overlay function layer are clarified, and the actual area of each unit pavement overlay each function layer is counted;The design area of each unit overlay each function layer pavement is calculated respectively, and summed, to obtain the design area of each lane overlay function layer pavement, as the engineering quantity of each lane pavement overlay function layer.The application is used for the engineering quantity calculation of pavement overlay function layer material in the case of surface appearing pitting, loose, aggregate spalling and other diseases, and can accurately calculate the engineering quantity of pavement overlay function layer material in design stage.

Description

Technical Field

[0001] This invention relates to the field of road engineering technology, specifically to a method for calculating the amount of pavement overlay functional layer engineering considering structural depth. Background Technology

[0002] Asphalt pavement maintenance is receiving increasing attention and has become an important part of highway and urban road construction in my country. Because the surface layer of asphalt pavement directly bears traffic loads and is affected by the natural environment, coupled with factors such as material and construction process control, long-term use can lead to aggregate spalling, asphalt aging, and decreased adhesion, resulting in defects such as pitting and loosening, and causing numerous micro-potholes, thus affecting pavement durability and driving comfort.

[0003] Currently, there are roughly five preventative maintenance schemes for asphalt pavements: fog seal, thin overlay, chip seal, slurry seal, and micro-surfacing. Fog seal is a preventative maintenance measure that uses a specialized fog seal sprayer to spray modified emulsified asphalt or other pavement protectants onto existing asphalt pavements. The thickness of a thin overlay is typically between 1 and 3 cm, the thickness of a chip seal is typically between 0.5 and 2.5 cm, and the thickness of a slurry seal and micro-surfacing is typically between 1 and 1.5 cm. In addition, for some roads, safety warnings are considered during maintenance, requiring the use of ultra-thin colored anti-skid wear layers (thickness in mm). For example, for urban roads, urban landscaping, and traffic management, colored anti-skid wear layers or synthetic running track structural layers (generally 8 to 13 mm thick) are required to be laid on motor vehicle lanes, non-motor vehicle lanes, or sidewalks (asphalt surface).

[0004] When a thin overlay, micro-surfacing, or colored anti-skid wear layer is added to a road surface with numerous tiny potholes due to the aforementioned surface roughness, looseness, and aggregate spalling, the added material will embed itself into the tiny potholes under the action of construction machinery and its own weight.

[0005] In existing technologies, when adding functional layers such as thin overlays, micro-surfacing, or colored anti-skid wear layers to conventional pavements, the engineering quantity is often calculated based on the actual overlay area during the design phase, without considering the engineering quantity of materials embedded in potholes. This leads to problems such as inaccurate engineering quantity calculations, large deviations in material procurement during the construction phase, and significant disputes over engineering quantity verification during the settlement phase, which is detrimental to construction preparation and subsequent engineering measurement and settlement. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention proposes a method for calculating the quantity of pavement overlay functional layers that considers structural depth. This method is used to calculate the quantity of pavement overlay functional layer materials when surface defects such as pitting, looseness, and aggregate spalling occur. It can accurately calculate the quantity of pavement overlay functional layer materials during the design phase, facilitating investment control, material procurement during the construction period, and construction preparation, and providing a basis for project measurement and settlement.

[0007] To achieve the above objectives, the present invention provides a method for calculating the quantity of pavement overlay functional layers considering structural depth, characterized by the following steps:

[0008] S1) Divide and mark the road to be paved with functional layers along the transverse lane direction and the longitudinal road segment direction, and take each road segment corresponding to each lane as a unit for calculating the amount of work to be paved with functional layers.

[0009] S2) Determine and mark the test points on each unit of the road surface;

[0010] S3) Determine the structural depth of each detection point marked in step S2), and calculate the average structural depth of each unit pavement.

[0011] S4) Specify the material type and required thickness of the functional layer for each unit road surface, and calculate the actual area of ​​each functional layer for each unit road surface.

[0012] S5) Calculate the design area of ​​each functional layer of pavement in each unit, and sum the design areas of each road segment corresponding to each lane to obtain the design area of ​​each lane to be paved with functional layers, which is used as the engineering quantity of paving with functional layers for each lane.

[0013] The design area for each functional layer of pavement in each unit is calculated using the following formula.

[0014]

[0015] In the formula,

[0016] S represents the design area of ​​the functional pavement layer added to each unit.

[0017] V represents the calculated total volume of the functional layer material added to each unit.

[0018] H represents the required thickness of the functional layer pavement in each unit.

[0019] This represents the average structural depth of each element.

[0020] S0 represents the actual area of ​​the functional layer added to the road surface of each unit.

[0021] Furthermore, in S1), the road transversely includes a motor vehicle lane, a non-motor vehicle lane, and a sidewalk.

[0022] Furthermore, in S1), the road is divided into several segments in the longitudinal direction of 200m to 500m. When the last segment is less than half the length of the segment, it should be included in the nth segment; when the last segment is more than half the length of the segment, it should be included in the (n+1)th segment for separate detection and calculation.

[0023] Furthermore, in S2), for motor vehicle lanes, multiple detection points are randomly selected and marked on each road segment, avoiding the cracks, including the left wheel track of the motor vehicle lane, the center line of the motor vehicle lane, and the right wheel track of the motor vehicle lane.

[0024] Furthermore, in S2), for the motor vehicle lane, three detection points are randomly selected on the left wheel track, the center line of the motor vehicle lane, and the right wheel track of the motor vehicle lane, respectively, and the distance between adjacent detection points is 20 to 50m.

[0025] Furthermore, in S3), the structural depth of each detection point is determined by manual sand spreading or electric sand spreading.

[0026] Furthermore, in S3), the average construction depth of each unit is accurate to 0.01 mm.

[0027] Furthermore, in S5), the design area for the functional layer pavement on each lane is obtained by the following formula.

[0028] S 总 =∑S 各路段

[0029] In the formula,

[0030] S 总 This indicates the design area for adding a functional layer of pavement to each lane.

[0031] S 各路段 This indicates the design area of ​​the functional pavement layer for each lane and corresponding road segment.

[0032] The advantages of this invention are:

[0033] 1. This invention is applicable to the calculation of the quantity of materials for road surface overlay functional layers when surface defects such as pitting, looseness, and aggregate spalling are present. First, the surface texture of each lane is inspected, and the average texture depth of each unit is calculated. During the inspection, the differences in surface texture between wheel track and non-wheel track, non-motorized vehicle lanes and sidewalks (using asphalt surface layer) after road service are fully considered, which realizes refined data collection and provides a basic basis for the calculation of the quantity of materials for road surface overlay functional layers, which helps to ensure the accuracy of the quantity calculation.

[0034] 2. This invention creatively provides the calculation steps and formulas for the engineering quantity of road surface overlay functional layer materials, which is simple and practical, and effectively solves the problem of low accuracy in calculating the engineering quantity of road surface overlay functional layer materials;

[0035] 3. The calculation method of the present invention is easy to implement, simple and precise, and has high accuracy, which can guide the design and construction preparation of the road surface overlay functional layer;

[0036] This invention provides a method for calculating the quantity of pavement overlay functional layers considering structural depth. It is used to calculate the quantity of pavement overlay functional layer materials when the surface has defects such as pitting, looseness, and aggregate spalling. It can accurately calculate the quantity of pavement overlay functional layer materials during the design stage, which facilitates investment control, material procurement and construction preparation during the construction period, and provides a basis for project measurement and settlement. Attached Figure Description

[0037] Figure 1 This is a flowchart of the present invention;

[0038] Figure 2 This is a schematic diagram of the construction depth detection plane of a single unit in an embodiment of the present invention;

[0039] Figure 3 for Figure 1 Schematic diagram of the inspection points in the central motor vehicle lane;

[0040] Figure 4 for Figure 1 Schematic diagram of inspection points on the China-Africa motor vehicle lane;

[0041] Figure 5 for Figure 1 Schematic diagram of the detection points on the central sidewalk;

[0042] Figure 6 Schematic diagram of a structure for filling potholes with a functional layer material for road surface;

[0043] In the diagram: 1. Motor vehicle lane; 2. Non-motor vehicle lane; 3. Sidewalk; 4. Side median strip or other facility strip; 5. Functional layer material for filling potholes; 6. Designed functional layer overlay material.

[0044] 11. Left wheel track of motor vehicle lane; 12. Center line of motor vehicle lane; 13. Right wheel track of motor vehicle lane.

[0045] Non-motorized vehicle lane centerline 21;

[0046] 31. Pedestrian walkway centerline. Detailed Implementation

[0047] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0048] In the description of this invention, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention.

[0049] like Figure 1 As shown, the present invention provides a method for calculating the engineering quantity of a pavement overlay functional layer considering structural depth, comprising the following steps:

[0050] S1) Divide and mark the road to be paved with functional layers along the transverse lane direction and the longitudinal road segment direction, and use each road segment corresponding to each lane as a unit to calculate the amount of work for paving functional layers.

[0051] Specifically, the road includes a motor vehicle lane 1, a non-motor vehicle lane 2, and a sidewalk 3 in the transverse direction.

[0052] Specifically, the road is divided into several segments in the longitudinal direction of 200m to 500m. When the last segment is less than half the length of the segment, it should be included in the nth segment; when the last segment is more than half the length of the segment, it should be included in the (n+1)th segment for separate detection and calculation.

[0053] This embodiment takes the design of adding a functional layer to a 2350m long urban secondary arterial road (standard cross-section is 29m = 3m sidewalk + 2m non-motorized vehicle lane + 2m side median + 0.25m curb + 3.5m motorized vehicle lane + 3.5m motorized vehicle lane + 0.5m double yellow line + 3.5m motorized vehicle lane + 3.5m motorized vehicle lane + 0.25m curb + 2m side median + 2m non-motorized vehicle lane + 3m sidewalk) as an example.

[0054] Lane 1 of the motor vehicle is marked as J from left to right. 1A J 1B J 1C J 1D Non-motorized vehicle lane 2 is marked as FJ from left to right. 2A FJ 2B Sidewalk 3 (with asphalt surface) is marked as R from left to right. 3A R 3B .

[0055] Given a total road length of 2350m, the road to be inspected is divided into 5 segments of 500m each. The last segment exceeds half of the 500m mark and should be inspected separately (segment 5, 350m long). Each segment of each lane is then marked as J.1A-1 J 1A-2 J 1A-3 J 1A-4 J 1A-5 J 1B-1 J 1B-2 J 1B-3 J 1B-4 J 1B-5 , ... J 1D-1 J 1D-2 J 1D-3 J 1D-4 J 1D-5 Each non-motorized vehicle lane and each section is marked with FJ. 2A-1 FJ 2A-2 FJ 2A-3 FJ 2A-4 FJ 2A-5 FJ 2B-1 FJ 2B-2 FJ 2B-3 FJ 2B-4 FJ 2B-5 Each sidewalk and each section is marked with R. 3A-1 R 3A-2 R 3A-3 R 3A-4 R 3A-5 R 3B-1 R 3B-2 R 3B-3 R 3B-4 R 3B-5 .

[0056] S2) Determine and mark the test points on each unit road surface.

[0057] Specifically, for motor vehicle lanes, multiple detection points are randomly selected and marked on each road segment, avoiding the cracks, including the left wheel track 11, the center line 12, and the right wheel track 13 of the motor vehicle lane; for non-motor vehicle lanes, multiple detection points are randomly selected and marked on the center line 21 of the non-motor vehicle lane on each road segment; and for sidewalks (using asphalt surface), multiple detection points are randomly selected and marked on the center line 31 of the sidewalk on each road segment.

[0058] Specifically, for the motor vehicle lane, three detection points are randomly selected on the left wheel track, the lane center line, and the right wheel track, with a distance L0 between adjacent detection points of 20–50 m; for the motor vehicle lane, three detection points are randomly selected on the non-motor vehicle lane center line 21, with a distance L0 between adjacent detection points of 20–50 m; for the sidewalk (using asphalt surface), three detection points are randomly selected on the sidewalk center line 31, with a distance L0 between adjacent detection points of 20–50 m, such as… Figure 2 As shown.

[0059] like Figures 3-5 As shown, for the motor vehicle lane, Z1, Z2, and Z3 are three detection points located on the left wheel track 11 of the motor vehicle lane; X1, X2, and X3 are three detection points located on the center line 12 of the motor vehicle lane; and Y1, Y2, and Y3 are three detection points located on the right wheel track 13 of the motor vehicle lane. For the non-motor vehicle lane, F1, F2, and F3 are three detection points located on the center line 21 of the non-motor vehicle lane. For the pedestrian walkway, R1, R2, and R3 are three detection points located on the center line 31 of the pedestrian walkway.

[0060] In this embodiment, the distance between adjacent detection points is L0 = 50m.

[0061] S3) Determine the structural depth of each test point marked in step S2), and calculate the average structural depth of each unit pavement.

[0062] Specifically, the structural depth at each testing point was determined using either manual or electric sand-spreading methods, such as... Figure 6 The diagram shown is a schematic of the construction of filling potholes with the functional layer material for road surface overlay.

[0063] Preferably, the average construction depth of each unit is accurate to 0.01 mm.

[0064] In this embodiment, the construction depth (accurate to 0.01 mm) of each test point marked in step S2 of the manual sand-spreading method in the "Specifications for Field Testing of Highway Subgrade and Pavement" (JTG3450-2019) is used to calculate the average construction depth of each lane and each road segment, as shown in Table 1.

[0065] Table 1. Average construction depth (mm) for each lane in each segment.

[0066]

[0067] S4) Specify the material type and required thickness of the functional layer for each unit road surface, and calculate the actual area of ​​each functional layer for each unit road surface.

[0068] Based on the functional requirements and technical and economic comparisons of motor vehicle lanes, non-motor vehicle lanes, and sidewalks (using asphalt surface layer), a clear plan for the functional layer of the road surface should be formulated, including materials and thickness.

[0069] In this embodiment, the motor vehicle lane is preventively maintained with a 1cm thick micro-surfacing treatment, while the non-motor vehicle lane and the sidewalk (asphalt surface) are respectively covered with blue and red anti-skid wear layers (3mm thick).

[0070] In this embodiment, the actual area of ​​the functional layer pavement is calculated separately for motor vehicle lanes, non-motor vehicle lanes, and sidewalks (using asphalt surface layer). The curb strip is included in the consideration of each adjacent lane, as shown in Table 2.

[0071] Table 2. Overlay area for each lane in each section (m²) 2 )

[0072]

[0073]

[0074] S5) Calculate the design area of ​​each functional layer of pavement in each unit, and sum the design areas of each road segment corresponding to each lane to obtain the design area of ​​each lane to be paved with functional layers, which is used as the amount of work for paving functional layers in each lane.

[0075] The design area for each functional layer of pavement in each unit is calculated using the following formula.

[0076]

[0077] In the formula,

[0078] S represents the design area of ​​the functional pavement layer added to each unit.

[0079] V represents the calculated total volume of the functional layer material added to each unit.

[0080] H represents the required thickness of the functional layer pavement in each unit.

[0081] This represents the average structural depth of each element.

[0082] S0 represents the actual area of ​​the functional layer added to the road surface of each unit.

[0083] The derivation process of the design area formula for each functional layer of pavement in the above units is shown below.

[0084] First, the volume of the functional layer material embedded within the surface texture depth of the road is:

[0085]

[0086] Then, the total volume of the added functional layer material is obtained, i.e.

[0087]

[0088] Finally, the design area for adding each functional layer of pavement to each unit is derived as follows:

[0089]

[0090] In the formula,

[0091] V0 represents the volume of the functional layer material embedded within the surface texture depth of the road surface.

[0092] This represents the average structural depth of each element.

[0093] S0 represents the actual area of ​​the functional layer added to the road surface of each unit.

[0094] V represents the calculated total volume of the functional layer material added to each unit.

[0095] V0 represents the volume of the functional layer material embedded within the surface texture depth of the road surface.

[0096] V1 represents the volume of the functional layer material designed according to the actual thickness.

[0097] H represents the required thickness of the functional layer pavement in each unit.

[0098] S represents the design area of ​​the functional layer pavement in each unit.

[0099] In this embodiment, the engineering quantities of different functional layers of each unit are calculated based on the above results, and the material engineering quantities are converted into the design area of ​​the design thickness. The calculation results are shown in Table 3.

[0100] Table 3. Engineering quantities (m²) for functional layers of motor vehicle lanes, non-motor vehicle lanes, and sidewalks 2 )

[0101]

[0102] Specifically, the design area for the functional layer pavement in each lane is obtained by the following formula.

[0103] S 总 =∑S 各路段

[0104] In the formula,

[0105] S 总 This indicates the design area for adding a functional layer of pavement to each lane.

[0106] S 各路段This indicates the design area of ​​the functional pavement layer for each lane and corresponding road segment.

[0107] In this embodiment, the final amount of micro-surfacing work for motor vehicle lane maintenance is 45246m. 2 (The actual area of ​​the motor vehicle lane is 34,500 m²) 2 The blue anti-skid wear layer for non-motorized vehicle lanes has a construction volume of 15207m². 2 (The actual area of ​​the non-motorized vehicle lane is 9200m²) 2 The red anti-slip wear layer for the sidewalk has a construction volume of 22,570 m². 2 (The actual area of ​​the sidewalk is 13800m²) 2 It can be seen that this method can provide a basis and theoretical support for calculating the material quantity of functional layer overlays on pavements with numerous minor potholes.

[0108] This invention provides a method for calculating the quantity of pavement overlay functional layers considering structural depth. It is used to calculate the quantity of pavement overlay functional layer materials when the surface has defects such as pitting, looseness, and aggregate spalling. It can accurately calculate the quantity of pavement overlay functional layer materials during the design stage, which facilitates investment control, material procurement and construction preparation during the construction period, and provides a basis for project measurement and settlement.

[0109] The above embodiments are preferred embodiments of the present invention, but the embodiments of the present invention are not limited to the above embodiments. Any changes, modifications, substitutions, combinations, or simplifications made without departing from the spirit and principle of the present invention shall be considered equivalent substitutions and shall be included within the protection scope of the present invention.

Claims

1. A method for calculating the quantity of pavement overlay functional layers considering structural depth, characterized in that, Includes the following steps: S1) Divide and mark the road to be paved with functional layers along the transverse lane direction and the longitudinal road segment direction, and take each road segment corresponding to each lane as a unit for calculating the amount of work to be paved with functional layers. S2) Determine and mark the test points on each unit of the road surface; S3) Determine the structural depth of each detection point marked in step S2), and calculate the average structural depth of each unit pavement. S4) Specify the material type and required thickness of the functional layer for each unit road surface, and calculate the actual area of ​​each functional layer for each unit road surface. S5) Calculate the design area of ​​each functional layer of pavement in each unit, and sum the design areas of each road segment corresponding to each lane to obtain the design area of ​​each lane to be paved with functional layers, which is used as the engineering quantity of paving with functional layers for each lane. The design area for each functional layer of pavement in each unit is calculated using the following formula. In the formula, S represents the design area of ​​the functional pavement layer added to each unit. V represents the calculated total volume of the functional layer material added to each unit. H represents the required thickness of the functional layer pavement in each unit. This represents the average structural depth of each element. S0 represents the actual area of ​​the functional layer added to the road surface of each unit.

2. The method for calculating the quantity of pavement overlay functional layers considering structural depth according to claim 1, characterized in that: In S1), the road transversely includes a motor vehicle lane (1), a non-motor vehicle lane (2), and a sidewalk (3).

3. The method for calculating the quantity of pavement overlay functional layers considering structural depth according to claim 2, characterized in that: In S1), the road is divided into several segments in the longitudinal direction of 200m to 500m. When the last segment is less than half the length of the segment, it should be included in the nth segment; when the last segment is more than half the length of the segment, it should be included in the (n+1)th segment for separate detection and calculation.

4. The method for calculating the quantity of pavement overlay functional layers considering structural depth according to claim 3, characterized in that: In S2), for the motor vehicle lane (1), multiple detection points are randomly selected and marked on each road segment, avoiding the cracks, including the left wheel track (11), the center line (12), and the right wheel track (13).

5. The method for calculating the quantity of pavement overlay functional layers considering structural depth according to claim 4, characterized in that: In S2), for motor vehicle lanes, three detection points are randomly selected on the left wheel track (11), the center line of the motor vehicle lane (12), and the right wheel track (13) of the motor vehicle lane, and the distance between adjacent detection points is 20 to 50 m.

6. The method for calculating the quantity of pavement overlay functional layers considering structural depth according to claim 1, characterized in that: In S3), the structural depth of each test point is determined by manual sand spreading or electric sand spreading.

7. The method for calculating the quantity of pavement overlay functional layers considering structural depth according to claim 6, characterized in that: In S3), the average construction depth of each unit is accurate to 0.01 mm.

8. The method for calculating the quantity of pavement overlay functional layers considering structural depth according to claim 1, characterized in that: In S5), the design area for the functional layer pavement in each lane is obtained by the following formula. S 总 =∑S 各路段 In the formula, S 总 This indicates the design area for adding a functional layer of pavement to each lane. S 各路段 This indicates the design area of ​​the functional pavement layer for each lane and corresponding road segment.

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